void LED_CLODE()
{
digitalWrite(2,HIGH);
digitalWrite(4,HIGH);
digitalWrite(A0,HIGH);
digitalWrite(9,HIGH);
}
void LED_HALF()
{
digitalWrite(2,HIGH);
digitalWrite(4,LOW);
digitalWrite(A0,LOW);
digitalWrite(9,HIGH);
}
void LED_OFF()
{
digitalWrite(2,LOW);
digitalWrite(4,LOW);
digitalWrite(A0,LOW);
digitalWrite(9,LOW);
}
void setup() {
  // put your setup code here, to run once:
pinMode(2,OUTPUT);
pinMode(4,OUTPUT);
pinMode(A0,OUTPUT);
pinMode(9,OUTPUT);
LED_OFF();
}

void loop() {
LED_HALF();
}
